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Homotopy properties of categories of extensions. (English) Zbl 0624.18005
Translation from Usp. Mat. Nauk 41, No.6(252), 179-180 (Russian) (1986; Zbl 0614.18010).

MSC:
18G15 Ext and Tor, generalizations, K√ľnneth formula (category-theoretic aspects)
55P10 Homotopy equivalences in algebraic topology
55P65 Homotopy functors in algebraic topology
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